The 1947 - Present Chevrolet & GMC Truck Message Board Network - 1971 C-20 Longhorn SM420 to 700R4 conversion

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- - 1971 C-20 Longhorn SM420 to 700R4 conversion (https://67-72chevytrucks.com/vboard/showthread.php?t=581878)

naystcb

05-26-2013 09:29 PM

1971 C-20 Longhorn SM420 to 700R4 conversion

I am swapping out the SM420 in my 1971 Cheyenne Longhorn C-20 with a 700R4 and need to know if and what type of flexplate or flywheel I need to get to make this conversion work or can I use existing flexplate? Please advise.

clinebarger

05-27-2013 08:11 PM

Re: 1971 C-20 Longhorn SM420 to 700R4 conversion

Quote:

Originally Posted by naystcb (Post 6091786)

Manual transmissions use a Flywheel, Autos use a Flexplate.

153 tooth flexplate & '92-'96 Corvette/Denso replacement starter...... Flexplate bolts, Torque converter bolts, & starter bolts are available from you local GM dealer

Clyde65

05-27-2013 08:37 PM

Re: 1971 C-20 Longhorn SM420 to 700R4 conversion

What about an nv4500 5speed to keep it manual?
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